Model 2001A - 4 1/2 Digit DC Voltmeter

4 1/2 DIGIT DC VOLTMETER
MODEL 2001A / 3001

1/8 DIN (2A)Case

Connections Diagram

STANDARD FEATURES
±19,999-count display span
±2 V to ±200 V dc ranges
True-differential input
120 dB CMR, 56 dB NMR
1 pA typical bias current
3-wire ratio measurement
Bright, 0.56 in (14.2 mm) LED display
Automatic zero and polarity
Display hold and test
115/230 V ac power
Short (104 mm deep) 1/8 DIN case

OPTIONS
Parallel BCD output
Isolated 9-32 V dc power
Isolated 26-56 V dc power
Screw-terminal barrier strip
NEMA-4 splash-proof lens cover

Model 2001A is a low-cost, true-differential 4 1/2 digit panel meter for applications that require high resolution and high accuracy DC measurement. It fits a standard 1/8 DIN panel cutout and requires a depth of less than 4.1 in (104 mm) behind the panel. Display span is ±19,999 counts. Accuracy is 99.98%.

INPUT RANGES
The 2001A offers DC voltage ranges of ±1.9999, ±19.999 and ±199.99 V dc. By using an external DC voltage refer-ence, any of these ranges can be configured for 3-wire ratio measurement.

OPTIONS
The meter can be electrically configured for three input voltage ranges, four decimal-point positions, high-impedance 3-wire ratio input. Parallel BCD and serial BCD. Mechanical options include a screw-terminal barrier strip for signal and power and a splash-proof lens cover which meets NEMA-4 requirements.

SPECIFICATIONS

ANAOLG INPUT

Range	±1.9999 V	±19.999 V	±199.99 V
Resolution	100 µV	1 mV	10 mV
Maximum Input	130 Vp	250 Vp	250 Vp
Input Resistance	1 Gohm	1 Mohm	1 Mohm
Bias Current	10 pA	1 pA	1 pA

Configuration: Differential, bipolar
Zero: Automatic
Span Adjustment: ±5%

NOISE REJECTION
NMR, SIG HI TO SIG LO: 56 dB, 50/60 Hz
CMR, SIG LO to ANA GND: 86 dB, DC to 60 Hz
CMR, AC GND to ANA GND: 120 dB, DC to 60 Hz
CMV, SIG LO to ANA GND: ±1 Vp
CMV, AC GND to ANA GND: 1500 Vp per HV test, 354 Vp per IEC spacing

ACCURACY AT 25°C
Maximum error: ±0.01% of reading ±2 counts
Span tempco: ±0.01% of reading/°C
Step response: 1s
Warmup to rated accuracy: 10 min

ANALOG-TO-DIGITAL CONVERSION
Technique: Dual-slope, average-value
Polarity: Automatic
Signal integration period: 100 ms
Read rate: 2.5/s

3-WIRE RATIO REFERENCE
Analog input range: ±2, ±20, ±200 V
External refernce input: +0.5 to +2.0 V
Load on reference, std: 6 kohm
Load on reference, opt: 100 Mohm
Accuracy: 99.98%

DISPLAY
Type: 7-segment, red LED
Height: 0.56 in (14.2 mm)
Symbols: 1.8.8.8.8
Decimal points: Four positions selectable by jumpers from front panel or at connector, 10 mA sink
Overrange indication: Four least-significant digits flash

DIGITAL INPUTS
HOLD and TEST inputs: TTL or 5 V CMOS compatible
Blanking Input: Open-collector compatible

POWER
AC voltages: 115 or 230 V ac ±15%
AC frequency: 49-440 Hz
DC voltages: 9-32 V dc, isolated to 300 Vp; 26-56 V dc, isolated to 300 Vp
Power consumption: 2.5 W
Output voltages: +4.7 V dc and 4.6 V dc ±5%,10 mA max

ENVIRONMENTAL
Operating temperature: 0 to 60°C
Storage temperature: 40 to +85°C
Relative humidity: 95% at 40°C (non-condensing)

MECHANICAL
Dimensions: Newport DIN2A (short 1/8 DIN) case (see Mechanical section for drawings)
Weight: 14 oz (400 g)
Case material: 94V-0 UL-rated polycarbonate